Your lowest latency is going to be with a Firewire audio interface. The best Firewire interface with a guitar input is the RME Fireface 400.
Triple interface just means that it can connect via USB, FireWire 400, and FireWire 800.
The IEEE 1394 Interface or Port is also know by it's Apple Mac name as FireWire.
You can search websites that are selling firewire audio interfaces for more information. You may also visit local electronic stores or mechanic shops that specialize in audio installation and sale.
FireWire (technically known as an IEEE 1394 interface) is an interface developed by Apple that allows you to plug peripherals such as video cameras into your computer. Most Macs come with a FireWire interface, some Windows PCs have fireWire built in or they can have it added by adding a FireWire card. Some manufacturers adopt their own name for the IEEE 1394 interface; Sony, for example, call it an iLink. If you have a camera, or some other peripheral, with a FireWire interface it will have come with a FireWire cable which you plug into your computer to allow the two to connect so you can transfer your video/images from the camera to the computer.
firewire
usb and firewire
The apple mac name of IEEE 1394 interface is FireWire.
The IEEE 1394 interface was largely developed by Apple and is marketed by them as FireWire.
Usb and firewire
USB and FireWire
If the computer is able to accept PCI cards you will need to add a FireWire card to the computer and connect the camera to that. (See links below)